Canadian Mopar
Senior Member
- Joined
- Mar 18, 2018
- Posts
- 109
- Reaction score
- 47
- Location
- Alberta
- Ram Year
- 2017 2500 SLT
- Engine
- 6.4L HEMI
I have a 2017 Ram 2500 with the 6.4L HEMI, just rolled over 140,000 km and while towing a trailer a few months ago I got a CEL with a cylinder misfire code on #7, when this happened there was a noticeable tapping noise in the top end, to me it sounded like #7, and the engine started to idle fairly rough. Thought that all these pointed to a cam / lifter issue. So I parked the truck and finally got around to pulling the engine here, checked and couldn't find any metal in the oil filter or really anywhere so I stripped it down and weirdly I think the lifters and cam look fine, they definitely are worn a bit but nothing that I can see that would be abnormal for this kind of mileage on the engine I think, maybe I'm wrong here. All the lifters are still rolling fine and the cam doesn't have any grooves or abnormal wear. A few of the lifters do have a noticeable groove on them, not sure what that is caused by or if it's anything that should be raising a yellow flag.
So now I'm stumped as I'm not sure if I caught this early enough that it was just on the verge of doing more major damage like some of the lifters and cams I've seen come out of these HEMIs or if there is something I'm not seeing here.
The only thing that has me worried is the exhaust valves are very white, now I've never had one of these HEMIs apart before, so not sure if that is normal with the MDS and how lean they run them or if that is something I should be looking further into.
The truck is mostly stock, it has a CAI, muffler delete, and an edge pulsar (I run on tow mode w/ MDS "disabled"). 90% of the miles since I've owned it are towing/hauling and on the highway.
If anyone could chime in and let me know if they have any ideas on what could possibly be going on here or what to check that would be greatly appreciated, thanks!
Edit: just to add, all my manifold bolts were still in tact and it didn't look like I had any leaks past the manifold gaskets so I don't think that an exhaust leak was causing the issue.
So now I'm stumped as I'm not sure if I caught this early enough that it was just on the verge of doing more major damage like some of the lifters and cams I've seen come out of these HEMIs or if there is something I'm not seeing here.
The only thing that has me worried is the exhaust valves are very white, now I've never had one of these HEMIs apart before, so not sure if that is normal with the MDS and how lean they run them or if that is something I should be looking further into.
The truck is mostly stock, it has a CAI, muffler delete, and an edge pulsar (I run on tow mode w/ MDS "disabled"). 90% of the miles since I've owned it are towing/hauling and on the highway.
If anyone could chime in and let me know if they have any ideas on what could possibly be going on here or what to check that would be greatly appreciated, thanks!
Edit: just to add, all my manifold bolts were still in tact and it didn't look like I had any leaks past the manifold gaskets so I don't think that an exhaust leak was causing the issue.
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